What does CUSIP 01749D105 represent in this 13F holders report?

CUSIP 01749D105 is the security identifier for ALGM - ALLEGRO MICROSYSTEMS, INC. - COMMON STOCK used to aggregate holder disclosures.

How many institutions held ALGM - ALLEGRO MICROSYSTEMS, INC. - COMMON STOCK in Q1 2026?

318 institutional investors reported ALGM - ALLEGRO MICROSYSTEMS, INC. - COMMON STOCK for Q1 2026. Use the holders table for investor-level position and value details.

ALLEGRO MICROSYSTEMS, INC. - COMMON STOCK (ALGM)

CUSIP: 01749D105

Q1 2026 13F Holders as of 31 Mar 2026

Security type / class: Equity / COMMON STOCK
Total 13F shares: 138,333,947
Total 13F value: $4,322,844,798
Share change: +1,860,816
Put/Call ratio: 83%
SEC-reported price per share: $31.53
Number of holders: 318
Value change: +$80,391,490
Number of buys: 186
Number of sells: 121
Shares outstanding: 186,722,785

Security key

01749D105

Report period

Q1 2026

Institutions

318

Top holders

ALGM full security history Ownership snapshot Full 13F holder table ALLEGRO MICROSYSTEMS, INC. SEC filings ALLEGRO MICROSYSTEMS, INC. company facts

Broader feeds

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Ownership snapshot

Top reported holders of ALGM - ALLEGRO MICROSYSTEMS, INC. - COMMON STOCK (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader

Capital Research Global I...

Disclosed value leader

FMR LLC

Comparable rows

15/15

Latest evidence

31 Dec 2025

13D/G 13F 3/4/5 Lead comparable stake: 7.1% 13D/G row: Capital Research Global Investors Showing 1-6 of 15 holder rows.

Quick read

Capital Research Global Investors leads the comparable SEC ownership view at 7.1%.

15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens Capital Research Global Investors's linked filing trail.

Comparable ownership Top 5

Capital Research Global Investors 7.1%

Richard R. Lury 0.01%

FMR LLC 13%

VANGUARD GROUP INC 7.6%

BlackRock, Inc. 6.5%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-6 of 15 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
Capital Research Global Investors	13D/G 13F Company 13D/G 13F	7.1%	$410,252,327 13,111,292 shares	-$87,395,004	31 Dec 2025
Richard R. Lury	3/4/5 Director 3/4/5	0.01%	$599,848 18,857 shares	-$222,673	12 Aug 2025
FMR LLC	13F Company 13F	13%	$623,510,987 23,635,746 shares	—	31 Dec 2025
VANGUARD GROUP INC	13F Company 13F	7.6%	$374,662,689 14,202,528 shares	—	31 Dec 2025
BlackRock, Inc.	13F Company 13F	6.5%	$321,874,446 12,201,457 shares	—	31 Dec 2025
Invesco Ltd.	13F Company 13F	4.1%	$201,834,725 7,651,051 shares	—	31 Dec 2025

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q1 2026

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

318

138,333,947

Rows available

318

Investor	Option	Weight %	Change %	SEC-reported value	* Price	Shares	Share Change	Activity	Report Period

^* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q1 2026 vs Q1 2026 Across Filers

Q1 2026 holders

318

Q1 2026 holders

318

Holder diff

Investor	Q1 2026 Shares	Q1 2026 Shares	Share Diff	Share Chg %	Q1 2026 value	Q1 2026 value	Value change	Value Chg %